參數(shù)資料
型號(hào): TWR-MCF51MM-KIT
廠商: Freescale Semiconductor
文件頁(yè)數(shù): 40/57頁(yè)
文件大小: 0K
描述: KIT TOWER DEV FOR MCF51AG
設(shè)計(jì)資源: TWR-MCF51MM Schematic
標(biāo)準(zhǔn)包裝: 1
系列: ColdFire®, Flexis™
類型: MCU
適用于相關(guān)產(chǎn)品: Freescale 電源塔系統(tǒng),MCF51MM
所含物品: 4 個(gè)板,線纜,文檔,DVD,MED-EKG 傳感器
Electrical Characteristics
Freescale Semiconductor
45
3.13 SPI Characteristics
Table 23 and Figure 15 through Figure 18 describe the timing requirements for the SPI system.
Table 23. SPI Timing
No.1
1 Numbers in this column identify elements in Figure 15 through Figure 18.
Characteristic2
2 All timing is shown with respect to 20% VDD and 70% VDD, unless noted; 100 pF load on all SPI pins. All timing assumes slew
rate control disabled and high drive strength enabled for SPI output pins.
Symbol
Min
Max
Unit
C
1
Operating frequency
Master
Slave
fop
fBus/2048
0
fBus/2
fBus/4
Hz
D
2
SPSCK period
Master
Slave
tSPSCK
2
4
2048
tcyc
D
3
Enable lead time
Master
Slave
tLead
12
1
tSPSCK
tcyc
D
4
Enable lag time
Master
Slave
tLag
12
1
tSPSCK
tcyc
D
5
Clock (SPSCK) high or low time
Master
Slave
tWSPSCK
tcyc –30
tcyc – 30
1024 tcyc
ns
D
6
Data setup time (inputs)
Master
Slave
tSU
15
ns
D
7
Data hold time (inputs)
Master
Slave
tHI
0
25
ns
D
8
Slave access time3
3 Time to data active from high-impedance state.
ta
—1
tcyc
D
9
Slave MISO disable time4
4 Hold time to high-impedance state.
tdis
—1
tcyc
D
10
Data valid (after SPSCK edge)
Master
Slave
tv
25
ns
D
11
Data hold time (outputs)
Master
Slave
tHO
0
ns
D
12
Rise time
Input
Output
tRI
tRO
tcyc – 25
25
ns
D
13
Fall time
Input
Output
tFI
tFO
tcyc – 25
25
ns
D
MCF51MM256/128, Rev. 5
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